Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1S4223 found under Hose Nonmetallic by Caterpillar Inc. The National Stock Number assigned to this part is 4720009889916, and the Federal Supply Class is 4720 Hose And Flexible Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1S4223.